import java.util.Scanner;

public class java7 {

    public static void main(String[] args) {

        Scanner sc=new Scanner(System.in);
        System.out.println("请输入年份哈，配活一下：");
        int year=sc.nextInt();
        System.out.println("请输入月份哈，配活一下：");
        int month=sc.nextInt();
        int day = 0;
        switch (month){
            case 1:
            case 3:
            case 5:
            case 7:
            case 8:
            case 10:
            case 12:
                day=31;
                break;
            case 4:
            case 6:
            case 9:
            case 11:
                day=30;
                break;
            case 2:
                if (year%400==0||(year%4==0&&year%100!=0)){
                    day=29;
                }else {
                    day=28;
                }
                break;
        }
        System.out.println("该月有"+day+"天");
    }
}
